Cable anchorage and its installation



Aug. 17, 1937. J. F. HOWE CABLE ANCHORAGE AND ITS INSTALLATION Filed Feb. 9, 1933 2 Sheets-Sheet l JAMES FOE/e567- Hon/E, W"

Aug. 17, 1937. J. F. HOWE CABLE ANCHORAGE AND ITS INSTALLATION Filed Feb. 9, 1933 2 Sheets-Sheet 2 enfoi'z 25 shapes and the engaging strand sockets.

1,30 ing the sockets.

.4 comprise Patented Aug. 17, 1937 PATENT OFFICE CABLE ANCHORAGE AND ITS INSTALLATION James Forrest Howe, Worcester, Mass, assignor to The American Steel and Wire Company of New Jersey, a corporation of New Jersey Application February 9, 1933, Serial No. 656,039

9 Claims.

This invention relates to multiple strand cable anchorages, one of the objects being the provision of a simplified apparatus. Other objects may become apparent later.

Generally speaking, the new anchorage consists of a plurality of structural shapes, interfastened in parallel spaced relationship to provide a frame having slots proportioned to receive socketed cable strands and to bring their sockets 11.1 into engagement with adjacent portions of the frame when tensions are applied.

Preferably, these shapes are interfastened in .such a manner that the slots are initially openended, whereby installation of the socketed 1.7.15 strands may be efiected by sliding them laterally into place. During this operation, one side of the frame of shapes may be permanently fixed to the masonry or main anchorage which is to receive the cable tensions, and the other side may 20 be temporarily mounted to hold the anchorage in place without interfering with its slots. This temporary mounting may be. removed and a permanent mounting substituted.

The usual shims may be placed between the The shapes must provide considerable depth to withstand the applied stresses, and it is therefore possible to apply strand shoes to the sides or edges of the shapes opposite from those engag- These strand shoes effectively take up the cable thrust caused by the angularity of the strands from their splay point to the shapes.

Referring to the accompanying drawings which J illustrate one form of the invention:

Figure 1 is a side view.

Figure 2 is a rear view.

Figures 3 and 4 are, respectively, horizontal cross-sectional and front views of the strand shoes.

Figures 5 and 6 are, respectively, front' and 'side views of a shim suitable for use with a strand socket.

In this form of the invention, structural shapes channel-bars l. Other structural shapes may prove suitable or even preferable to channels, although flanged shapes should generally prove most desirable.

These channels are interfastened at their bot- 5 toms by a pin 2 which passes through all the Washers 0 may be placed between the eye-bars 4 and the channels to provide better bearing surfaces.

The cable strands 5 may be laterally inserted in the open-ended slots provided by the construction as so far described, the slots being sufficiently narrow to bring the sockets 6, on the ends of these strands, into engagement with adjacent portions of the shapes. These portions are the shapes sides or edges opposite the strands extending portions. As these shapes are in the present instance flanged, it will be seen that firm bearing surfaces are provided these sockets. Obviously, bearing blocks or other separable, and consequently relatively fragile, parts are unnecessary.

In other words, the various strands pass completely between the shapes to the rear portions of the latter and the sockets transmit the strand tensions directly to these portions because the latter are too closely spaced to permit the sockets to longitudinally pass between them. The sockets are not buried within the shapes but are out in the open at the rear of the anchorage. Tension is transmitted to the entire anchorage and the latter, as is subsequently described, then transmits this tension by way of its upper and lower ends to the main anchorage.

During the installation of the strands 5, the structural shapes I are temporarily positioned by fiat bars 1 that connect backwardly to a suitable support, which may be the main anchorage. These bars should be arranged so as not to cover up the open ends of the slots between the channels.

Conventional shims 6 may be interposed between the channels and the engaging strand sockets where necessary to equalize the strand tensions. Otherwise, the sockets directly engage the channels.

When the various strands are all positioned, the temporary positioning bars I may be loosed and a pin 2*, which is a duplicate of the pin 2, passed through the other ends of all the channels, thus closing the slots. Although not mentioned, it is of course to be assumed that the channels are properly apertured to permit the passage of these two pins. This latter pin is likewise secured in place by nuts 3 and mounts the eyebars 4, which may be fixed to the main anchorage, and washers 4 That is, both ends of the channels are now similarly interfastened and assembled. Washers A may also be interposed between the nuts 3 and the channels, if desired.

When the installation is thus far completed,

it may prove desirable to strengthen the resulting frame by riveting or bolting bars 8 across the fronts and backs of the shapes. Preferably, two bars are fixed to both sides or edges of the shapes, one being above the strands and the other below in each instance.

Strand shoes 9 are preferably bolted to the sides or edges of the shapes opposite to those engaged by the strand sockets, so as to take 10 up the strands thrusts due to the angularity .of their splay point to the shapes. These shoes are illustrated as each comprising a U-shaped member having a recess 9 which receives the strands 5 and is flared outwardly to prevent undue wear on the cable strands. The open face of the recess 9 is arranged away from the-center line of the cables splay point to prevent dislodgement of the cable strands.

The sockets 6 are illustrated as being-square in shape, but "it is to be understoodth-at any conventionaltype orshape of socket might be used. It might also be noted that the channels I are arranged with their closed faces opposite each other. This is done only to simplify the construction and is not a necessary feature.

I claim: 7

1. A multiple strand cable anchorage including the combinationof a frame providing a plurality of slots at least some of which are each proportioned to longitudinally receive .a plurality of transversely extending strands but which are sufliciently narrow to prevent the transverse passage of sockets on the ends of these strands when the latter are tensioned, and means for connecting said frame to a main anchorage, said frame being constructed sothat the ends of said slots may be open at least during the in- I stallation of the anchorage.

2. A multiple strand cable anchorage includ- 40 ing'the combination of a frame providing a plu rality of slots at least some of which are each proportioned to longitudinally receive a plurality of transversely extending strands but which are sufliciently narrow to completely prevent the transverse passage of sockets on the ends of these strands. when the latter are tensioned, and means for connecting the portions of said frame adjacent the ends of. said slots to a main anchorage, said frame and means being constructed and arranged so that the ends of said slots may be open during installation of the anchorage, whereby already socketed strands may be laterally received by saidslots, and may be closed by said means upon completion of the installation.

3. A multiple strand cable anchorage including the combination of a plurality of structural shapes, means for interfastening said shapes in laterally spaced parallel relationship to provide a plurality of slots and for connecting them to a main anchorage so that said slots are transverse to the strands to beanchored, and a plurality of socketed strands arranged transversely through said slots and extending completely between said spaced shapes to the rear portions of the latter, said shapes being too closely spaced to permit the sockets on said strands to transversely pass therebetween.

4. A multiple strand cable anchorage including the combination of a plurality of structural shapes, means for interfastening the said shapes in laterally spaced parallel relationship to provide a plurality of slots and for connecting them to a main anchorage so that said slots are transverse to the strands to be anchored, and a pmrality of socketed strands arranged transversely ing the combination of a plurality of structural shapes, means for interfastening said shapes in laterally spaced parallel relationship and for connecting themto a main anchorage, a plurality of socketed strands arranged transversely through saidslots-and extending completely between said spaced shapes to the rear portions of the latter, said shapes being too closely spaced to permit-{the sockets to transversely pass therebetween, and strand shoes applied to the front portions of said shapes and-engaging said strands so as to take the thrust of the latter caused-by their necessarily splayed relationship.

6. A multiple strand cable anchorage including the combination of a plurality of structural shapes, means for 'interfas'tening the said shapes in laterally spaced-parallel relationship and for connecting them to a main anchorage, a plurality of socketed strands arranged transversely through said slots and extending-completely between said spaced shapes to'the rear portions of the latter, said shapes being too closely spaced to permit the sockets to pass transversely therebetween and said shapes-having flat facing portions and right-angularly flanged "rear portions through which the sockets on said-strandstransmit the: strand tensions to the anchorage, and strand shoes applied to the front port-ions of said shapes and engaging said strandsso asto take the thrust of the'latter caused-bytheir-necessarlly splayed relationship.

'7. A multiple strand'cable anchorage-including a framemade of a pluralityof elongated members interfastened in parallel spaced -relationship and means for mounting said frame transverse .to socketed "strands comprising one end of the cable to be -anchored,--said strands being arranged transversely between said-members with their "sockets behind the same, said members having, flanges at their back edges and being spaced sufiicientlyto cause said sockets to be pulled into engagement with saidflangeswhen said strands are tensioned. e

8. "A multiple -strand-cable anchorage including a frame made of-a plurality of elongated -members interfastened in parallel spaced relationship and means for mounting said frame transverse to socketed strandscomprisingoneend of the cable to be anchored, said-strands beingarranged transversely between said members with their sockets behind the-same, said --members *hav-ing flanges at their back edges and being spaced sufiiciently to cause said sockets to be pulled into engagement with-said flanges when said strands are tensioned, said members being interfastened by removable pin elements passed transversely through their respective ends-to form saidframe, whereby removal of one of saidelements permits longitudinal insertion of said strands between transversely through their respective ends to form said frame, whereby removal of one of said elements permits longitudinal insertion of said strands between said members, and the fronts of said members being provided with strand 5 shoes which engage said strands.

JAMES FORREST HOWE. 

